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Home  >>  Products  >>  Measuring Instruments  >>  Ion Series

Ion Series Microbalances / Semi-Microbalances / Analytical Balances

Weighing is at the heart of many laboratory processes and the Ion Series offers the features, performance and standard accessories to bring real convenience to your lab. With the six balances of the Ion Series, you can choose a capacity as high as 520g or a microbalance with readability down to 1μg. The BM-20 and BM-22 let you handle with confidence even trade quantities of valuable or degradable substances.

Critical to precision weighing is static control, which is why the direct current fanless ionizer is standard on all models.

The automatic response adjustment function uses environmental data from built-in sensors to compensate the balance’s characteristics to deliver fast and stable results. Calibration is also automatic and always available with a single key press. A range of accessories add extra convenience.

Microgram (μg) Measurements Made Simpler. The BM-20 and BM-22 microbalances have the performance and standard accessories to simplify microgram measurements. The Ion Series now makes microgram (μg) measurements accessible to all researchers and offers a real choice in microbalances.



Technical Data

Technical Data
Model BM-20 BM-22 BM-252 BM-200 BM-300 BM-500
Weighing Capacity: 22g 5.1g/22g1 250g 220g 320g 520g
Resolution: 0.001 mg (1 μg) 0.001 mg (1 μg)
0.01 mg (10 μg)
0.01 mg (10 μg) 0.1 mg
Minimum Weighing Value: 0.001 mg 0.001 mg / 0.01 mg 0.01 mg 0.1 mg
Repeatability: (Std Deviation) 0.0025 mg
(for 1 g)
0.004 mg / 0.01 mg 0.03 mg
(for 100 g)
0.1 mg 0.2 mg
Linearity: ±0.010 mg ±0.010 mg / ±0.02 mg ±0.010 mg ±0.2 mg ±0.3 mg ±0.5 mg
Stabilization Time: (set to FAST) Approx. 10 sec. Approx 10/8 sec. Approx 8 sec. Approx. 3.5 sec.
Sensitivity Drift: (10°C to 30°C) ±2 ppm / °C (When automatic self calibration is not used)
Operating Temp.: 41°F to 104°F (5°C to 40°C), 85% RH or less (non-condensing)
Display Refresh Rate: 5 times / second or 10 times / second
Measurement Units: (Display mode) g, mg, oz, ozt, ct, momme, dwt, GN, tael, tola, messghal, pieces (counting mode), % (percent mode), Specific gravity
Counting Mode: Minimum unit mass = 0.1 mg / Number of samples = 10, 25, 50 or 100 pieces
Percent Mode: Minimum 100% ref. mass = 10.mg / Minimum 100% display = 0.01%, 0.1%, 1%
(depends on the reference mass stored)
Internal Memory: 200 sets weighing data / 100 sets with date & time / 50 sets of calibration data
External Data Logger: Store up to 5,000 weighing results with date & time to AD-1688 (standard)
Data Output: GLP/GMP/GCP/ISO compliant. Outputs: balance manufacturer, model,s/n, balance identification number, data, time of calibration, mass used, and space for signature.
Standard Interface: RS-232C, Quick USB, External key plug for optional foot switch (SW:128)
Internal Calibration: Motor-driven internal calibration
External Calibration Masses: (g) 20, 10, 5, 2, 1 200, 100, 50, 20, 10 200, 100, 50 300, 200, 100, 50 500, 300, 300, 100, 50
Ionizer Electrode Pin Life: Approx. 10,000 hours of continuous use. (User replaceable)
Weighing Pan Diameter: 25mm (50mm, 95mm for weighing filters) 90mm
Power Consumption: Approx. 30 VA (supplied by the AC adapter)
External dimensions/Weight: 259 (W) x 466 (D) x 326 (H)mm / Approx. 10 kg
1 Smart range function: The minimum weighing value switches to 0.01 mg automatically when the display value exceeds 5.1g but returns to 0.001 mg by pressing the RE-ZERO (tare) key.



Ion Series


Eliminating Frustrations in Precision Weighing



Error Diagram

The Challange

Static, while often overlooked, can seriously degrade precision weighing. An electrostatically charged object induces the opposite charge in nearby objects. The resulting attraction causes inaccuracies as shown below.

Filter papers, disposable weigh boats and plastic centrifuge containers can all become charged just from normal handling. And charged powders can be displaced, causing cross-contamination.

The Solution

Better, Safer Measurements.
Understanding and removing static electricity is critical to accurate weighing. The built-in ionizer improves weighing by eliminating static. And because the direct current (DC) method is used, the ionizer needs no fan. So, you can neutralize static in fine powders without the risk of compromising your sample.

Static control is so important the built-in ionizer is standard in all Ion Series balances. Simply hold the sample in the upper neutralizing chamber for a few seconds before weighing.


Standard Accessories



Interlocking Doors

Interlocking Doors
Use this feature to open either door from the opposite side, or open both doors with one hand. You work more quickly and efficiently when you can use both hands.



All BM Series balances come with the AD-1688 Data Logger, A&D WIN-CT software, and are compliant with GLP/GMP/GCP/ISO industry best practices.

RS-232 and USB ports are standard on all BM Series balances.


Weighing Data Logger

AD-1688 Weighing Data Logger
Stores up to 5,000 weighing results with date, time, temperature, humidity and atmospheric pressure. Download to a PC via USB port.


Weighing Pans

Dedicated Weighing Pans for BM-20/22
The BM-20 and BM-22 include two filter weighing pans, designed to minimize the influence of drafts.

Also included with the BM-20 and BM-22 are holders for micro-centrifuge tubes and 3 sizes of disposable aluminum pans with diameters of 8, 12, 15 mm.



Option BM-14 Pipette Testing Kit






Prices subject to change    Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only    Export orders require quotations - click here for a quote     For more info call us 1-800-762-2478 or 954-946-9454.
Item Number Item Prices
BL-BM-20 22g capacity, 1μg resolution $15,530.00
BL-BM-22 5.1g/22g capacity, 1/10μg resolution 14,351.00
BL-BM-252 250g capacity, 10μg resolution 8,820.00
BL-BM-200 220g capacity, 0.1mg resolution 6,946.00
BL-BM-300 320g capacity, 0.1mg resolution 7,278.00
BL-BM-500 520g capacity, 0.1mg resolution 7,711.00
BL-AD-1653 Density determination kit (for BM-252/200/300/500 only) 592.00
BL-AD-1671 Anti-vibration Table (slab) 1,429.00
BL-AD-1682 Rechargeable battery unit 727.00
BL-AD-1684 Electrostatic Fieldmeter 1,573.00
BL-AD-1688 Weighing Data Logger3 337.00
BL-AD-1689 Tweezers for calibration weight3 203.00
BL-AD-1192 Compact printer 500.00
BL-AD-8121B Statistical printer 936.00
BL-AD-8920A Remote display. 284.00
BL-AD-8922A Remote controller 667.00
BL-AX-BM-031 Display covers (5 pcs) 60.00
BL-AX-BM-NEEDLESET Electrode units, For Ionizer 119.00
BL-KO:WW9/9 RS-232C cable (9p-9p, 2m) 43.00
BL-SW:128 Foot switch 79.00
BL-AX-T-314A-S External key plug 101.00
BL-AX-USB-2920-9P Serial/USB converter 58.00
3 Included as standard with any BM Series balance
BL-BM-082 Ethernet interface with WinCT-Plus software 895.00
BL-BM-14 Pipette Accessory Testing Ki
2 BM-08 and the standard Quick USB interface cannot be used at the same time.


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